90133261 has 4 divisors (see below), whose sum is σ = 90239292. Its totient is φ = 90027232.

The previous prime is 90133193. The next prime is 90133271. The reversal of 90133261 is 16233109.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 54671236 + 35462025 = 7394^2 + 5955^2 .

It is a cyclic number.

It is not a de Polignac number, because 90133261 - 2¹¹ = 90131213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90133271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51730 + ... + 53443.

It is an arithmetic number, because the mean of its divisors is an integer number (22559823).

Almost surely, 2^90133261 is an apocalyptic number.

It is an amenable number.

90133261 is a deficient number, since it is larger than the sum of its proper divisors (106031).

90133261 is a wasteful number, since it uses less digits than its factorization.

90133261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106030.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 90133261 is about 9493.8538539415. The cubic root of 90133261 is about 448.3615494588.

The spelling of 90133261 in words is "ninety million, one hundred thirty-three thousand, two hundred sixty-one".